东山煤矿高温工作面降温技术分析

Analysis on Cooling Technologies for High-temperature Working Face in Dongshan Coal Mine

随着开采深度的不断增加,地温逐渐升高,煤矿井下高温热害日趋严重,导致事故率上升,严重制约了矿山开采向纵深发展。针对东山煤矿1231采煤工作面的高温环境,应用矿井热环境理论和矿井通风技术,分析风流自地面流向1231采煤工作面过程中风流温度的变化,得出各种热源对矿井风流升温的影响,为防治热害提供理论依据。通过增加风量、改变工作面通风方式等几种降温技术,工作面平均温度从28.41℃降低到26℃,降温效果明显,有效地改善了1231采煤工作面的气候环境。

With the increase of mining depth, the earth temperature goes up gradually; heat damage is to be on the rise, which results in the increase of accident rate and sefioualy constraints the mining＇ s development in depth. Aiming at the high temperature circumstance of 12.31working face in Dongshan coal mine, by applying thermal environment theory and mine ventilation, the variation of air- current temperature is analyzed as the air- current flows from the ground to working face 1231, and the various heat sources＇ influences on temperature rise are found out, which provides a theoretical proof for pn.wenting and curing the heat damage. There is an obvious cooling effect that the average temperature of working face re- duccs from 28.41 ℃ to 26 ℃ by cooling technologies such as increasing air quantity, altering ventilation pattern of working face, and etc., which effectively improves the climatic environment of working face 1231.